 /*******************************************************************************
  * Copyright (c) 2005, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.commands;

 import org.eclipse.core.commands.common.AbstractHandleObjectEvent;

 /**
  * An instance of this class describes changes to an instance of
  * {@link ParameterType}.
  * <p>
  * This class is not intended to be extended by clients.
  * </p>
  *
  * @see IParameterTypeListener#parameterTypeChanged(ParameterTypeEvent)
  * @since 3.2
  */
 public final class ParameterTypeEvent extends AbstractHandleObjectEvent {

     /**
      * The parameter type that has changed. This value is never
      * <code>null</code>.
      */
     private final ParameterType parameterType;

     /**
      * Constructs a new instance.
      *
      * @param parameterType
      * The parameter type that changed; must not be <code>null</code>.
      * @param definedChanged
      * <code>true</code>, iff the defined property changed.
      */
     ParameterTypeEvent(final ParameterType parameterType,
             final boolean definedChanged) {

         super(definedChanged);

         if (parameterType == null) {
             throw new NullPointerException ();
         }

         this.parameterType = parameterType;
     }

     /**
      * Returns the instance of the parameter type that changed.
      *
      * @return the instance of the parameter type that changed. Guaranteed not
      * to be <code>null</code>.
      */
     public final ParameterType getParameterType() {
         return parameterType;
     }

 }

